An impression cylinder drive device for a printing press

Abstract

The present invention relates to a plate cylinder drive device of a printing press. A rotating main shaft is arranged on a support frame. A roller shaft clamping opening is provided at the front end of the rotating main shaft. A separation gap is provided between the clamping claw units around the roller shaft clamping opening. A clamping drive outer surface is provided on the outer side surface of the clamping claw unit. A clamping tightening drive body is provided with a clamping drive inner surface, and the clamping drive inner surface is arranged on the outer side of the clamping drive outer surface for driving cooperation. The roller shaft of the plate cylinder does not need to be directly connected to the driving motor in the form of a whole through shaft. The roller shaft of the plate cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft of the plate cylinder is clamped and loosened by the roller shaft clamping opening for disassembly and assembly, and the clamping and opening of the roller shaft clamping opening can be achieved by operating the clamping tightening drive body to act on the clamping claw unit, which is practical and convenient, and is more convenient for the replacement and maintenance of the roller shaft of the plate cylinder, and has more advantages for the use scenario of the plate cylinder with an integrated structure of the drum and the roller shaft.

Description

Technical Field

[0001] The invention relates to a printing press, in particular to a transmission structure of a printing roller thereof. Background Art

[0002] Printing machines, such as flexographic printing mechanisms, have a printing roller for printing, and the circumferential surface of the printing roller is equipped with a printing plate. Currently, the printing roller can be a split structure (i.e., a roller shaft and a roller mounted on the roller shaft), or an integrated structure (i.e., the roller shaft and the roller are connected as one). In these two types of structures, the roller shaft of the printing roller is a through-shaft structure, and the roller shaft is directly connected to the drive motor through the shaft, and some mechanical transmission structures are required to be connected, which makes the roller shaft difficult to disassemble and assemble. When repair, maintenance, replacement or specification change is required during use, the entire transmission connection structure between the roller shaft and the drive motor needs to be disassembled and assembled, which is time-consuming and laborious. In addition, the roller shaft of this through-shaft structure usually adopts a structure that can replace and install the printing plate sleeve, so as to avoid frequent disassembly and assembly of the roller shaft, and only the printing plate sleeve needs to be replaced and installed. However, the additional configuration structure for replacing and installing the printing plate sleeve not only makes the structure of the printing roller more complicated, but also has many problems such as the deviation of the position between the printing plate sleeve and the roller shaft, resulting in inaccurate printing. Summary of the invention

[0003] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a plate roller transmission device of a printing press with more convenient roller disassembly and assembly.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a plate roller transmission device of a printing press, comprising a support frame, a rotating main shaft and a clamping and tensioning transmission body, the rotating main shaft is arranged on the support frame, and a rotating support component is arranged between the rotating main shaft and the support frame, characterized in that: a roller clamping opening is arranged at the front end of the rotating main shaft, and a clamping claw unit is arranged around the roller clamping opening, and a separation gap is arranged between the clamping claw units, and each clamping claw unit is enclosed on the inner side to form the roller clamping opening, and a clamping transmission outer surface is arranged on the outer side of the clamping claw unit; the clamping and tensioning transmission body has a clamping transmission inner surface, and the clamping transmission inner surface is arranged on the outer side of the clamping transmission outer surface, and the clamping transmission inner surface and the clamping transmission outer surface are arranged for transmission coordination.

[0005] The following various optimizations or supplementary explanations can be made on the above technical solutions respectively.

[0006] For example, a roller bearing portion is provided at the front end of the support frame, and a roller pressure cover is provided above the roller bearing portion, and the roller pressure cover is installed on the support frame; an installation position for assembling the roller bearing is reserved between the roller pressure cover and the roller bearing portion; the shaft head of the roller is assembled in the roller clamping mouth.

[0007] For example, the support frame has mounting holes, and the rotating main shaft and the clamping tightness transmission body are arranged in the mounting holes. The rotating main shaft axially penetrates through the mounting holes, and the rotating support member is arranged between the rotating main shaft and the mounting holes. In addition, a rotating drive motor is also provided on the support frame, and the rotating drive motor is in transmission connection with the rotating main shaft; the rotating drive motor can also be in transmission connection with a transmission shaft, and a coupling is provided between the transmission shaft and the rotating main shaft.

[0008] Among them, the clamping tightness transmission body adopts a clamping sleeve, the inner surface of the clamping transmission is located in the inner ring of the clamping sleeve, and the clamping sleeve is sleeved outside the rotating main shaft; the clamping jaw units are arranged circumferentially on the rotating main shaft. For example, the clamping jaw units are evenly arranged circumferentially.

[0009] Furthermore, further optimization is carried out. The front or rear part of the clamping tightness transmission body has clamping jaw units, there is a separating gap between the clamping jaw units, and the inner surface of the clamping transmission is located on the inner side surface of the clamping jaw units. On this basis, further optimization is carried out. A clamping adjustment sleeve is also connected outside the clamping tightness transmission body, and a clamping adjustment nut is also connected between the clamping adjustment sleeve and the clamping tightness transmission body.

[0010] In addition, the clamping tightness transmission body is in transmission connection with the axial movement transmission device.

[0011] For example, the axial movement transmission device includes a fork arm, the fork arm is hinged on the support frame or the fork arm is axially movably arranged on the support frame, a transmission component is provided on the fork arm, a groove is provided on the clamping tightness transmission body, and the transmission component is arranged in the groove. For example, the groove adopts an annular groove, the transmission component adopts a roller, and the clamping tightness transmission body is connected to the rotating main shaft. In addition, the axial movement transmission device also includes a fork transmission part, the fork transmission part is in transmission connection with the fork arm, and the fork transmission part includes a fork power source or a fork handle with a locking unit.

[0012] For example, the inner surface of the clamping transmission adopts an inner conical surface, and / or the outer surface of the clamping transmission adopts an outer conical surface; the inner conical surface and / or the outer conical surface adopts a conical surface or a frustum conical surface.

[0013] In addition, a spiral groove is also provided on the rotating main shaft, and the spiral groove takes the central axis of the rotating main shaft as the center line; a hollow cavity of the rotating main shaft is provided at the center of the spiral groove, and the hollow cavity communicates with the outside of the rotating main shaft through the spiral groove.

[0014] For example, a support core shaft is provided in the hollow cavity of the rotating main shaft, and there is a clearance between the support core shaft and the rotating main shaft.

[0015] For another example, a central hole is provided at the central axis of the rotating main shaft, the rear end of the support core shaft is fixedly connected to the rotating main shaft, the central hole includes the hollow cavity, and the support core shaft penetrates through the central hole.

[0016] The beneficial effects of the present invention are as follows. In the plate cylinder transmission device of the printing press, the roller shaft of the plate cylinder does not need to be directly connected to the driving motor in the form of a whole through shaft. The roller shaft of the plate cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft of the plate cylinder is clamped and loosened by the roller shaft clamping opening for disassembly and assembly, and the clamping and opening of the roller shaft clamping opening can be achieved by operating the clamping and loosening transmission body acting on the clamping jaw unit, which is practical and convenient, and is more convenient for the replacement and maintenance of the roller shaft of the plate cylinder, and has more advantages in the use scenario of the plate cylinder with an integrated structure of the drum and the roller shaft. Therefore, the present invention has prominent substantive features and significant progress compared with the prior art. Description of the Drawings

[0017] The following describes the embodiments of the present invention, as well as the relevant details and working principles, in conjunction with the drawings.

[0018] Figure 1 It is a schematic side view structure diagram of the plate cylinder transmission device of the printing press in the present invention.

[0019] Figure 2 is Figure 1 a cross-sectional view of, and a schematic diagram after the fork arm swings.

[0020] Figure 3 is Figure 2 an enlarged view of A in, in which the roller shaft is hidden.

[0021] Figure 4 It is a schematic three-dimensional structure diagram of the front end of the rotating main shaft, in which the clamping adjustment sleeve is in a disassembled state.

[0022] In the figure: 60, support frame; 61, rotating main shaft; 62, clamping and loosening transmission body; 63, rotating support component; 64, roller shaft clamping opening; 65, clamping jaw unit; 66, separation gap; 67, outer surface of the clamping transmission; 68, inner surface of the clamping transmission; 69, roller shaft supporting part; 70, roller shaft gland; 71, roller shaft bearing; 72, shaft head; 73, mounting hole; 74, rotating drive motor; 75, transmission shaft; 76, coupling; 77, clamping claw unit; 78, separating gap; 79, clamping adjustment sleeve; 80, clamping adjustment nut; 81, axial movement transmission device; 82, fork arm; 83, transmission component; 84, groove; 85, fork transmission part; 86, spiral groove; 87, hollow cavity; 89, support core shaft; 90, movable gap; 91, center hole; 92, hinge shaft; 93, roller shaft; 94, notch. Detailed Embodiments

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the implementation manners of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Referring to the accompanying drawings, in the embodiment of this implementation manner, a printing machine includes a plate cylinder transmission device. The plate cylinder transmission device of a printing machine includes a support frame 60, a rotating main shaft 61, and a clamping tightness transmission body 62. The rotating main shaft 61 is arranged on the support frame 60. A rotating support member 63 (such as a bearing, etc.) is provided between the rotating main shaft 61 and the support frame 60. The rotating main shaft 61 is supported on the support frame 60 by the rotating support member 63 for rotation.

[0025] Among them, a roller shaft clamping port 64 (represented by a dotted line box in the figure) is provided at the front end of the rotating main shaft 61, that is, the roller shaft 93 of the plate cylinder can be inserted into the roller shaft clamping port 64 and clamped.

[0026] The periphery of the roller shaft clamping port 64 is a clamping claw unit 65. There is a separation gap 66 between the clamping claw units 65. Each clamping claw unit 65 encloses to form the roller shaft clamping port 64 inside. That is, the periphery of the roller shaft clamping port 64 is divided into individual clamping claw units 65 by the separation gap 66. When each clamping claw unit 65 clamps inward, it cooperates to clamp the roller shaft 93 of the plate cylinder, and when released, the roller shaft 93 is released.

[0027] The outer surface of the clamping claw unit 65 is provided with a clamping transmission outer surface 67 so that an external force acts on the clamping transmission outer surface 67 to make the clamping claw unit 65 clamp inward.

[0028] The clamping tightness transmission body 62 has a clamping transmission inner surface 68. The clamping transmission inner surface 68 is arranged outside the clamping transmission outer surface 67. The clamping transmission inner surface 68 and the clamping transmission outer surface 67 are arranged in transmission cooperation (such as taper fit transmission, for example, the inner taper surface and the outer taper surface fit transmission structure). That is, when the clamping tightness transmission body 62 moves axially, it will use the clamping transmission inner surface 68 to act on the clamping transmission outer surface 67 to make the clamping claw unit 65 clamp inward. When the clamping tightness transmission body 62 axially retreats, the clamping transmission inner surface 68 retreats in position to make the clamping claw unit 65 open outward and return to its original position.

[0029] Its working principle is as follows: The roller shaft 93 of the plate cylinder can be inserted into the roller shaft clamping opening 64. The roller shaft clamping opening 64 at the front end of the rotating main shaft 61 on the support frame 60 cooperates to clamp and release the roller shaft 93, so that the roller shaft 93 of the plate cylinder can be connected to the rotating main shaft 61. It not only realizes the installation of the roller shaft 93 of the plate cylinder in cooperation, but also can drive the roller shaft 93 of the plate cylinder to rotate. During assembly, the roller shaft 93 of the plate cylinder is inserted into the roller shaft clamping opening 64, and then the clamping and loosening transmission body 62 axially moves outside the rotating main shaft 61. The inner surface 68 of the clamping transmission acts on the outer surface 67 of the clamping transmission to make the clamping jaw unit 65 clamp inward, so that the roller shaft clamping opening 64 clamps the inserted roller shaft 93 of the plate cylinder. When disassembling, the clamping and loosening transmission body 62 axially retreats, the clamping jaw unit 65 opens outward, and the roller shaft clamping opening 64 loosens (i.e., opens) to release the roller shaft 93 of the plate cylinder.

[0030] In the plate cylinder transmission device of this printing machine, the roller shaft 93 of the plate cylinder does not need to be directly connected to the drive motor in the form of a whole through shaft. The roller shaft of the plate cylinder can be independently disassembled and assembled, and the disassembly and assembly are relatively more convenient and efficient. The roller shaft 93 of the plate cylinder is clamped and released by the roller shaft clamping opening 64 for disassembly and assembly, and the clamping and opening of the roller shaft clamping opening 64 can be achieved by operating the clamping and loosening transmission body 62 to act on the clamping jaw unit 65. It is practical and convenient, more convenient for the replacement and maintenance of the roller shaft 93 of the plate cylinder, and has more advantages in the use scenario of the plate cylinder with an integrated structure of the drum and the roller shaft.

[0031] Based on the above embodiments, the following optimizations or further explanations can be made respectively.

[0032] For example, a roller shaft supporting part 69 is further provided at the front end of the support frame 60, and a roller shaft pressing cover 70 is also provided above the roller shaft supporting part 69. The roller shaft pressing cover 70 (usually connected by a fastener 97) is installed on the support frame 60. There is an installation position for assembling the roller shaft bearing 71 between the roller shaft pressing cover 70 and the roller shaft supporting part 69. The roller shaft bearing 71 on the roller shaft 93 of the plate cylinder will be placed on the roller shaft supporting part 69. The roller shaft supporting part 69 cooperates to support the roller shaft (and the roller shaft bearing 71). In addition, the roller shaft pressing cover 70 cooperates to press the roller shaft bearing 71, and cooperates to stably support the roller shaft 93 (and the roller shaft bearing 71), avoiding the problem of excessive load when the entire roller shaft 93 of the plate cylinder is only connected and fixed by the roller shaft clamping opening 64 of the rotating main shaft 61. The roller shaft supporting effect is better, and it can be applied to the overhanging structure of the roller shaft. The shaft head 72 of the roller shaft is assembled in the roller shaft clamping opening 64.

[0033] The support frame 60 has a mounting hole 73 to form a support sleeve structure, and the rotating spindle 61 and the clamping tension transmission body 62 are arranged in the mounting hole 73, wherein the rotating spindle 61 axially passes through the mounting hole 73, and the rotating support component 63 is arranged between the rotating spindle 61 and the mounting hole 73, and the rotating support component 63 cooperates to support the rotating spindle 61 to rotate on the mounting hole 73 of the support frame 60; the rotating support component 63 (such as a bearing) is installed in the mounting hole 73 and is installed by a gasket 95 and an end cover 96.

[0034] The support frame 60 may also be provided with a rotary drive motor 74, which is in transmission connection with the rotary main shaft 61. The rotary drive motor 74 drives the rotary main shaft 61 to rotate, and the rotary main shaft 61 drives the assembled plate roller to rotate synchronously. There are many transmission connection structures between the rotary main shaft 61 and the rotary drive motor 74. For example, the rotary drive motor 74 is in transmission connection with a transmission shaft 75, and a coupling 76 is provided between the transmission shaft 75 and the rotary main shaft 61, which is convenient for assembly and adaptation of different specifications, and has a relatively compact structure. The rotary drive motor 74 can be equipped with a reducer for transmission connection.

[0035] For another example, the clamping and loosening transmission body 62 adopts a clamping sleeve, and the clamping transmission inner surface 68 is located in the inner circle of the clamping sleeve. The clamping sleeve will be sleeved outside the rotating main shaft 61. The clamping and loosening transmission body 62 has a full circle (one circle) of the clamping transmission inner surface 68, and each clamping claw unit 65 is evenly clamped and the loosening synchronization is better, the clamping force is more uniform, and the clamping effect is better; the clamping claw units 65 are arranged along the circumferential direction on the rotating main shaft 61 (can be evenly arranged). The roller clamping opening 64 is more uniform when it contracts and clamps (i.e. clamps) the roller of the plate roller, the force is better, and the transmission is relatively more balanced and more stable.

[0036] It can be further optimized. The front or rear part of the clamping and loosening transmission body 62 is provided with clamping jaw units 77. There is a separation gap 78 between the clamping jaw units 77. That is, the front or rear part of the clamping and loosening transmission body 62 is circumferentially divided into individual clamping jaw units 77 by the separation gap 78. Each clamping jaw unit 77 will form a circle. Among them, the inner surface 68 of the clamping transmission is located on the inner side of the clamping jaw unit 77; An adjusting sleeve 79 is also connected to the outside of the clamping and loosening transmission body 62. The adjusting sleeve 79 will be sleeved on the outer ring of the clamping jaw unit 77. A clamping adjusting nut 80 is also connected between the adjusting sleeve 79 and the clamping and loosening transmission body 62. By adjusting the relative axial position of the adjusting sleeve 79 with the clamping adjusting nut 80, the tightness of the clamping jaw unit 77 can be adjusted (that is, the size of the inner diameter of the circle enclosed by each clamping jaw unit 77 - the size of the inner circle, and the size of the separation gap 78 will also change), so that the tightness (the size of the inner circle) of the inner surface 68 of the clamping transmission of the clamping and loosening transmission body 62 can be adjusted, realizing the adjustment of different clamping forces of the clamping and loosening transmission body 62 under the same axial movement stroke (finally fed back to the different opening degrees of the release of the roller shaft clamping port 64 and the clamping and loosening of the clamping jaw unit 65), so as to meet the requirements of different sizes of roller shaft diameters. The inner side surface of the adjusting sleeve 79 and the outer side surface of the clamping and loosening transmission body 62 can adopt taper fit (such as the cooperation of the inner taper surface and the outer taper surface) to realize the tightness clamping adjustment.

[0037] In addition, the clamping and loosening transmission body 62 can be connected to the axial movement transmission device 81. The axial movement transmission device 81 cooperates to drive the clamping and loosening transmission body 62 to axially move and switch positions, so that the axial position of the clamping and loosening transmission body 62 is adjustable. By axially moving and switching the position of the clamping and loosening transmission body 62, the inner surface 68 of its clamping transmission axially moves and acts on the outer surface 67 of the clamping transmission of the rotating main shaft 61, so that the clamping jaw unit 65 clamps inward; When it is necessary to release the roller shaft, the clamping and loosening transmission body 62 axially retreats. When the clamping and loosening transmission body 62 retreats, the inner surface 68 of the clamping transmission retreats, so that the clamping jaw unit 65 opens outward and returns to its original position.

[0038] There are many ways for the axially movable transmission device 81 to drive the clamping tensioning transmission body 62. For example, the axially movable transmission device 81 includes a fork arm 82, which is hinged on the support frame 60 (as shown in the figure, a swinging structure is formed on the support frame 60 through the hinge shaft 92 to drive the clamping tensioning transmission body 62 to move axially) or the fork arm 82 moves axially (moves in an axial sliding manner, such as a slide rail cooperation manner, etc.) and is arranged on the support frame 60. A transmission component 83 is provided on the fork arm 82, and a groove 84 is provided on the clamping tensioning transmission body 62. The transmission component 83 is configured in the groove 84, and the fork arm 82 cooperates in the groove 84 through the transmission component 83 to drive the clamping tensioning transmission body 62 to move axially and switch positions. For example, the groove 84 adopts an annular groove, and the annular groove structure enables the clamping tension transmission body 62 to rotate together with the rotating main shaft 61 and to cooperate with the transmission component 83 for transmission smoothly; the transmission component 83 adopts a roller, and the roller rotates relatively in the annular groove more smoothly; the clamping tension transmission body 62 is connected to the rotating main shaft 61. If the clamping tension transmission body 62 is sleeved on the outside of the rotating main shaft 61, the clamping tension transmission body 62 can be supported by the rotating main shaft 61 and can rotate together with the rotating main shaft 61. The transmission component 83 on the fork arm 82 can also cooperate in the annular groove to drive the clamping tension transmission body 62 to move axially. The internal structure is relatively compact. Generally, notches 94 are provided on the left and right sides of the support frame 60 (such as its support sleeve structure) for the transmission component 83 of the fork arm 82 to pass through and extend into the groove 84. In addition, the axial movement transmission device 81 also includes a fork transmission member 85, which is in transmission connection with the fork arm 82, and the fork transmission member 85 drives the fork arm 82 to swing or move axially on the support frame 60. The fork transmission member 85 includes a fork power source (such as a cylinder or a motor, etc.) or a fork handle with a locking unit (for locking its relative position).

[0039] For example, the inner surface 68 of the clamp transmission can be an inner conical surface, and / or the outer surface 67 of the clamp transmission can be an outer conical surface, and the inner surface 68 of the clamp transmission and the outer surface 67 of the clamp transmission form a taper matching transmission. Among them, the inner conical surface and the outer conical surface can be a conical surface or a truncated cone surface or a conical plane, a cone surface of a cone, a frustum, or a prism. The inner conical surface and / or the outer conical surface are a conical surface or a truncated cone surface, which is convenient to process and manufacture and runs more smoothly. Of course, the inner surface 68 of the clamp transmission and the outer surface 67 of the clamp transmission can also adopt matching surfaces of other shapes.

[0040] Furthermore, for further optimization, a spiral groove 86 is provided on the rotating main shaft 61, and the spiral groove 86 takes the central axis (i.e., the axis line) of the rotating main shaft 61 as the center line; a hollow cavity 87 of the rotating main shaft 61 is located at the center of the spiral groove 86, and the hollow cavity 87 communicates with the outside of the rotating main shaft 61 through the spiral groove 86. A section (corresponding to the section of the spiral groove 86) of buffer elastic structure is formed on the rotating main shaft 61 for micro-swing position, realizing swing fine adjustment, which can solve the problem that the roller shaft of the plate roller is not concentric with the rotating main shaft 61. Even if there are certain (concentricity and coaxiality) deviations, they can be compensated by the buffer elastic structure, enabling the roller shaft and the rotating main shaft 61 to be smoothly assembled and driven, and also reducing the influence of vibration to ensure the printing effect. For further optimization, a support core shaft 89 is provided in the hollow cavity 87 of the rotating main shaft 61, and there is a movable gap 90 between the support core shaft 89 and the rotating main shaft 61. The movable gap 90 provides a swinging space for the buffer elastic structure and limits the swinging range. In addition to satisfying the slight swinging and shaking of the rotating main shaft 61 through the position of the spiral groove 86 section, the support core shaft 89 can also support and protect it inside to prevent the rotating main shaft 61 from breaking at the spiral groove 86. The size of the movable gap 90 can limit the range of shaking and slight swinging and can be set according to requirements. For example, a central hole 91 is provided at the central axis of the rotating main shaft 61, the rear end of the support core shaft 89 is fixedly connected to the rotating main shaft 61, the central hole 91 includes the hollow cavity 87 (i.e., the hollow cavity 87 is a part of the central hole 91, and the central hole 91 can adopt an axially arranged through hole), and the support core shaft 89 is inserted into the central hole 91. The rear end of the support core shaft 89 can be fixedly connected to the rear end of the rotating main shaft 61.

Claims

1. A plate cylinder driving device of a printing press, comprising a support frame (60), a rotating main shaft (61) and a clamping and loosening driving body (62), the rotating main shaft (61) being arranged on the support frame (60), characterized in that: A roller shaft clamping port (64) is provided at the front end of the rotating main shaft (61), the periphery of the roller shaft clamping port (64) is a clamping claw unit (65), a separation gap (66) is provided between the clamping claw units (65), and each clamping claw unit (65) encloses the roller shaft clamping port (64) on the inner side, and a clamping driving outer surface (67) is provided on the outer side surface of the clamping claw unit (65); The clamping and loosening driving body (62) has a clamping driving inner surface (68), the clamping driving inner surface (68) is arranged on the outer side of the clamping driving outer surface (67), and the clamping driving inner surface (68) and the clamping driving outer surface (67) are arranged in driving cooperation; The clamping and loosening driving body (62) is in driving connection with an axial movement driving device (81); The axial movement driving device (81) includes a fork arm (82), the fork arm (82) is hinged on the support frame (60) or the fork arm (82) is axially movably arranged on the support frame (60), a driving component (83) is provided on the fork arm (82), a groove (84) is provided on the clamping and loosening driving body (62), and the driving component (83) is arranged in the groove (84), The groove (84) is an annular groove, the driving component (83) is a roller, and the clamping and loosening driving body (62) is connected to the rotating main shaft (61); The axial movement driving device (81) further includes a fork driving part (85), the fork driving part (85) is in driving connection with the fork arm (82), and the fork driving part (85) includes a fork power source or a fork handle with a locking unit.

2. The plate cylinder transmission device of a printing press according to claim 1, characterized in that: A roller shaft supporting part (69) is further provided at the front end of the support frame (60), a roller shaft pressing cover (70) is further provided above the roller shaft supporting part (69), and the roller shaft pressing cover (70) is installed on the support frame (60); an installation position for assembling a roller shaft bearing (71) is left between the roller shaft pressing cover (70) and the roller shaft supporting part (69); the shaft head (72) of the roller shaft is assembled in the roller shaft clamping port (64).

3. A plate cylinder drive device of a printing press according to claim 1, characterized in that: The support frame (60) has an installation hole (73), the rotating main shaft (61) and the clamping and loosening driving body (62) are arranged in the installation hole (73), the rotating main shaft (61) axially penetrates through the installation hole (73), and a rotating support component (63) is arranged between the rotating main shaft (61) and the installation hole (73); A rotating driving motor (74) is further provided on the support frame (60), and the rotating driving motor (74) is in driving connection with the rotating main shaft (61); The rotating driving motor (74) is in driving connection with a transmission shaft (75), and a coupling (76) is provided between the transmission shaft (75) and the rotating main shaft (61).

4. A plate cylinder drive device of a printing press according to claim 1, characterized in that: The clamping and loosening driving body (62) is a clamping sleeve, the clamping driving inner surface (68) is located on the inner ring of the clamping sleeve, and the clamping sleeve is sleeved outside the rotating main shaft (61); the clamping claw units (65) are arranged in a circumferential arrangement on the rotating main shaft (61).

5. The plate cylinder drive device of a printing press according to claim 4, characterized in that: The clamping claw units (65) are evenly arranged circumferentially; The front or rear part of the clamping and loosening transmission body (62) is provided with a clamping claw unit (77), and a separation gap (78) is provided between the clamping claw units (77). The inner surface (68) of the clamping transmission is located on the inner side of the clamping claw unit (77). An adjusting sleeve (79) for clamping is also connected to the outside of the clamping and loosening transmission body (62), and an adjusting nut (80) for clamping is also connected between the adjusting sleeve (79) for clamping and the clamping and loosening transmission body (62).

6. The plate cylinder transmission device of a printing press according to claim 1, characterized in that: The inner surface (68) of the clamping transmission is an inner conical surface, and / or the outer surface (67) of the clamping transmission is an outer conical surface; the inner conical surface and / or the outer conical surface is a conical surface or a frustum conical surface.

7. The plate cylinder transmission device of a printing press according to claim 1, characterized in that: A spiral groove (86) is provided on the rotating main shaft (61), and the spiral groove (86) takes the central axis of the rotating main shaft (61) as the center line; a hollow cavity (87) of the rotating main shaft (61) is provided at the center of the spiral groove (86), and the hollow cavity (87) communicates with the outside of the rotating main shaft (61) through the spiral groove (86).

8. The plate cylinder drive device of a printing press according to claim 7, characterized in that: A support core shaft (89) is provided in the hollow cavity (87) of the rotating main shaft (61), and a movable gap (90) is left between the support core shaft (89) and the rotating main shaft (61).

9. The plate cylinder drive device of a printing press according to claim 8, characterized in that: A central hole (91) is provided at the central axis of the rotating main shaft (61). The rear end of the support core shaft (89) is fixedly connected to the rotating main shaft (61). The central hole (91) includes the hollow cavity (87), and the support core shaft (89) is arranged in the central hole (91).

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